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Production, Characterization, and Immobilization of Partially Purified Surfactant-Detergent and Alkali-Thermostable Protease From Newly Isolated Aeromonas Caviae

Production, Characterization, and Immobilization of Partially Purified Surfactant-Detergent and Alkali-Thermostable Protease From Newly Isolated Aeromonas Caviae

Sumitra Datta, Gopalakrishnan Menon, Bincy Varughese

Prep Biochem Biotechnol. 2017 Apr 21;47(4):349-356.

PMID: 27737605

Abstract:

Proteolytic Aeromonas caviae P-1-1 growing at wide-ranging pH (7.0-11.0) and moderate salinity (0-5% NaCl) was isolated from cattle shed of Thanjavur, India. It produced lipase, gelatinase, and polyhydroxybutyrate. Different culture conditions, incubation time, carbon and nitrogen sources, vitamins, amino acids, surfactants, and metal ions for optimal growth and protease production of P-1-1 were examined. Maximum protease (0.128 U/mL) production was achieved with 1% fructose, 1% yeast extract, 0.1% ammonium sulfate, 3% NaCl, 0.1% CaCl2 · 2H2O, 1% glycine, 0.1% vitamin E, and 0.1% Tween-40 at pH 8.0 after 42 hr of incubation at 37°C. It was active over broad range of pH (7.0-12.0), temperature (15-100°C), and salinity (0-9% NaCl) with optima at pH 10.0, 55°C, and 3% NaCl. It retained 65 and 48% activities at pH 12.0 and 100°C, respectively. Partially purified protease was highly stable (100%) within pH range 7.0-12.0 and salinities of 0-5% NaCl for 48 hr. Cu2+, Mn2+, Co2+, and Ca2+ did not inhibit its activity. Its stability at extreme pHs, temperatures, and in the presence of surfactants and commercial detergents suggests its possible application in laundry detergents. Partially purified protease was immobilized and reused. This is the first report of alkali-thermotolerant, surfactant-detergent-stable partially purified extracellular protease from A. caviae.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42411510	Yeast Nitrogen Base Without Amino Acids and Ammonium Sulfate			Price

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